Photomechanical apparatus for transferring designs from flat to cylindrical surfaces



25 1927-. l 1,646,392 Get y J. DARBY ET AL PHOTOMECHANICAL APPARATUS FORTRANSFERRING DESIGNS FROM FLAT To CYLINDRICAL SURFAGES AFiled Dec, 23.1922 4 Sheets-Sheet l 1,646,392 J. DARBY ET AL PHOTOMECHANICAL APPARATUSFOR TRANSFERRING DESIGNS l FROM FLAT TO CYLINDRICAL SURFACES Dec, 23,1922 4 Sheets-Sheet 2 Oct. 25 1927.

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Oct. 25 1927. 1646 392 J. DARBY l-:T'AL l IHOTOMECHANICAL APPARATUS FORTRANSFERR DESIGNS FROM FLA o CYL NDRIGAL sUR'FAc l K F d Dec. 23, 1922 4Sheets-Sheet 4 UD N ln N

@513| 54"* @bho/0141243 Patented Oct. 25, 1927. I i

UNITED STATES PATENT OFFICE.

JOHN DARBY, OF SUMMIT, NEW JERSEY, AND HARRY C. JONES, OF LARCHMONT. NEW

YORK, ASSIGNORS TO LITHOPBINTEX CORPORATION, OF NEW YORK, N. Y., A COR-PORATION OF NEW YORK.

PHOTOMECHANICAL APPARATUS FOR TRANSFEIRRING DESIGNS FROM FLAT TOCYLINDRICAL SUR-FACES.

Application filed December 23, 1922. Serial No. 608,652.

T he invention relates to photomeclianical shown and described in UnitedStates Letapparatus for transferring designs from at ters Patent N o.1,051,997, granted February to cylindrical surfaces andmore particularlyLl., 1912-3. to apparatus for this purpose embodying The inventionconsists in the novel feameans for moving the design plate or transturcs, arrangements and construction and parent-y linearlysimultaneously or in unicoinbinations of parts shown and hereinson withthe rotary movement of the cylinafterv described in accordance with thepredrical surface while the design is projected. fcrred embodimentthereof, and the inven- 60 It has heretofore been proposed to transtOIiWill be more particularly. pointed out fer designs from a flat. surfaceto a cylinin the appended claims.

drical surface both by contact printing and Further objects andadvantages of the photomechanically, and the manner of pre-v Inventionwill more fully appear from the paring the sensitized cylindricalsurface, the following description taken in connection 65 manner oftreating same to etch or perwith the accompanying drawingsillustratmanently record the transferred design on lng, by way of'example, the present prethe cylindrical surface, as well as the vari*ferred embodiment of the invention. i ous uses to which such cylindricalsurfaces. Referring to the drawings, thus completed may be put, are nowwell Fig. 1 is a side elevation of a machine 70 understood by thoseskilled in the art, and embodying the invention;

need not be discussed herein. Fig. 2 is an enlarged elevation, partly,in

For the sake of brevity in the following section, of a part of themachine shown in description the cylindrical surface will be F1g. 1;referred to as the roller since a printing Fig. 3 shows a detail takenon line 3 3` 75 roller is a common embodiment of, these 0f Fig. Q-looking in the direction of the printing surfaces. But. it will bey.tinderarrow; y

stood that where in the specification and Fig. 4 is a top plan view ofthe machine; claims the terms roller and complete rev- Fig. 5 is anenlarged elevation, partly in elution of the roller?7 are used, suchexpressection, of the machine taken on line 5 5 of 80 sions are to beunderstood as being broad Fig. 1 looking in the direction of the arrow,

P enough to include, respectively, any cylinand showing the front of thedesign carrier drical or curved sensitized surface and the and relatedapparatus; peripheral movement thereof necessary to Fig. 6 is anenlarged View, partly in sectake the'total height of the design tohetion, taken on line.6'6 of Fig. 5; 35 transferred thereto. It will alsobe under- Fig. 7 is an enlarged detail of gearing stood that the termdesign is used as sigshown in Fig. 4;

nifying any photographic plate or trans- Fig. 8 is an enlarged view,partly in seeparency bearing the design or any other tion, showingapparatus providing a light suitable form of the design to be transslotin front of the sensitized plate; 9o ferred. Fig. 9 is an enlargedelevation, partly in 4U One of the principal objects of theinvensection, showing apparatus providing alight tion is to providemeans in the connection slot in front of thesensitized roller; betweenthe carrier for the design plate Fig. 10 is an enlarged elevation,partly in and the rotary support for the sensitized section, and withcertain parts broken away, 95 roller, which will cause the design tomove looking toward the sensitized roller as linearly at a rate of speedthat is constant shown in Fig. 4; with respect to the peripheralvelocity of Figs. 11 and 12 illustrate enlarged views the sensitizedroller throughout the comof details hereinafter described; pleterevolution of said sensitized roller so Fig. 13 is a side elevation of amodiiiea- 100 as to produce an accurate reproduction of tion of themachine shown in Fig. 1; and the design as transferred to the roller.Fig. 14 is a diagrammatic illustration.

The invention in some aspects is intended A brief general description ofthe arrangeas an improvement upon the apparatus ment and operationof theparts Will first be given and this will then be followed by a detaileddescription of the arrangement,

construction and operation of the parts.

Referring more particularly-to the drawings, Figs. 1, 4 and 5, 1 is thedesign carrier adapted to carry any suitable form of de-` sign, patternor picture to be reproduced 011 the sensitized roller, such for exampleas the photographie plate or transparency 2, said carrier being adapted,through the operation of suitable apparatus hereinafter described, tomove vertically upon parallel upright guides 3, the design plate 2 beingsecured in any suitable w-ell known manner to the carrier 1, and thelatter being adjustable vertiwhich in the'present form'of the machine isillustrated as a rotary member 5 to which the sensitized roller 6 issuitably coupled for rotation therewith as hereinafter described. Thisrotary member 5 is dri-ven in any suitable manner from a power shaft 7which is also operatively geared to move the plate carrier vertically onits guides. To the power shaft is geared suitable automatic stopapparatus comprising a gear wheel 8 having a laterally projecting pin 9adapted, when released by lever 10 to permit the wheel to rotate througha half revolution whereupon the pin 9 will strike a stationaryco-operating stop bracket 11 to arrest the rotation of the wheel, andwith it the rotation 7ofthe rotary support 5. 'The gearing is such thatthe rotary support will make one complete revolution for a halfrevolution of the stop wheel 8. The connecting means between the rotarysupport 5 and the plate carrier 1 comprises what might generally betermed adjustable differential apparatus 12 which will cause the designcarrier to be moved vertically the desired distance on its verticalguides for one revolution of the rotary support 5, and hence for onerevolution of the sensitized roller 6.

Between the design carrier and the sensitized roller 6 there is mountedon the horizontal frame 4 a lens carrier 13 carrying a lens forprojecting the design image onto the sensitized roller. In the presentembodiment of the invention this lens carrier is slidably movable onlyover a somewhat lim- O ited distance along the horizontal frame for thepurpose of getting proper adjustments of the focus of the lens, butwithout providi ing such a length of movement as to use different sizelenses, and without providing for image projections in various ratios Asis well understood,"a suitable adjustable light source, .shown somewhatdiagrammatically at L, Figs. 1 and 4, will be provided behind the designplate with a suitable shield between it and the design plate so as topermit the light rays through a properly shaped opening, to emanate fromthe light source onto the design plate. It is understood that bellows orlight shields 13 may also be used along the optical axis where desired.

Referring now more in detail to the roller end of the machine, we willdescribe, in connection with Figs. 1, 4, 10 and 11, means for rotatingthe roller and for adjusting the same with respect to the focal plane ofthe lens.

The left-hand end of the machine is provided with upright pillow-blocks14 and 15, the pillow-block 14 having a suitable bearing for the rotarysupport 5 to which is suitably secured worm wheel 16, and at the innerend of the rotary support 5 any suitable means, such as illustrated by acoupling sleeve and nut 17, is provided for coupling to the rotarysupport a mandrel 18 on which the roller 6 is mounted. The other end ofthe mandrel is journaled inany suitable manner in pillow-block 15, andthe position of the roller longitudinally of the mandrel is adjusted inany suitable manner, such for example as by .adjustment nuts 19, 19threaded onto the mandrel and bearing against washers or sleeves 20.

The roller is rotated in any suitable manner, such for example as by thedrive shaft 7 having a worm 21 meshing with the worm wheel 16, the shaft7 being driven in any suitable manner as by a pulley 22.

It is necessary to adjust the sensitized roller somewhat back and forthalong the carriage so that rollers of different size can be brought intoposition where their sensitized surface is tangent to the focal plane ofthe lens, and for this purpose the pillowblocks 14 and 15, as shown inFigs. 4 and 10, arc slidably mounted on guidcways 223, 23 iu thehorizontal frame, each pillow-block being provided with a short rack 24meshing with a gear 25, these gears being suitably keyed to a'tral'isverse shaft 26 journaled in the main frame and carrying a wormgear sector 27 keyed thereto and in turn meshing with a worm 28 operatedby hand wheel 29.

it will be feeu from this that as the hand lwheel 29 is rotated in onedirection or the other, it will cause the rack and pillowblocks to moveback and forth along the main frame so as to adjust the sensitizedroller 7, to and from the focal plane of the lens, the location of whichis indicated by the vertical surface 30 of the adjustment-determiningmeans 31 (see Fig. 11). This back and forth movement of the pillowblockobviously requires a corresponding to and fro movement of the worm 2lalong shaft 7, and to accomplish this purpose any suitable known meansmay be provided. the present instance the shaft 7 at its lefthand end isjournaled in bearings 32, 32 carried by a journal bracket 33, suitablybolted as at 34 to the pillow-block to move therewith, the shaft 7 beingadapted to freely slide in said bearing members while the worm 2l isslidably keyed on the shaft to permit relative movement of the shaft.The worm itself may be adjusted back and forth relativel to the shaftbetween the two bearing members 32, 32 in any suitable and well knownmanner as by washers and nuts to take up lost motion or the like, thesame not being illustrated as it is well understood by those skilled inthe art. lVith this construction it will be seen that when the handwheel 29 is rotated to move the roller back and forth on the main frame,the worm 21 and the bearing members 32, 32 will move as an integral partwith the pillow-blocks.

In order that the sensitized roller` may be allowed to make exactly onecomplete revolution and no more while the design is being projectedthereon, so that if the movement of the design carrier with respect tothe 'circumference of the roller is properly adjusted the design willexactly meet on the roller, it is necessary to provide accurate meansfor starting and, stopping the roller. In the present embodiment of theinvention stop apparatus is provided as heretofore mentioned, which willtake care of this feature, the stop apparatus consisting of the stopwheel 8 mounted'on a shaftv 8 and geared to a. worm 35 keyed to thepower shaft 7. This worm is of such a pitch with respect to worm 2l onthe same shaft, that as stated, a half revolution of the worm lwheel 8will allow exactly one revolution of the worm wheel 16, a-nd hence ofthe sensitized roller 6. It is preferred to provide a rigid positivelyacting release and stop for this purpose, and to connect the power tothe shaft by a suitable yielding` connection such for example as a belton the pulley 22 that may be allowed to slip after the stop -pin 9engages the stop-bracket vll. Normally the control lever lt), which isswiveled on a pin 31, has its lower notched end engaging the stop pin 9,in which position the lever is held by a spring 37. lVith the beltrunning, as soon as the control lever l() is thrown to the right. thewheel 8 being released, rotates for exactly one-half revolutionwhereupon it engages the bracket ll` which positively arrests furtherrotation of the wheel 8 and hence further rotation of the sensitizedrol'ler rigidly geared thereto, whereupon the power belt is allowed toslip until the power is shut olf, or the application of power may beautomatically terminated in any suitable manner. The stop bracket 1l isadjustably mounted in any suitable manner to give accu- Inv rateadjustments for stopping purposes, and in the present instance thebracket 1l is swivelcd on a pin 3S aud is provided with a transverseslot 3,9 through which extends a clamping screw 40. lith thisarrangement, when the screw 4t) is released, the bracket may be swunglnore or less about its pivot 38 to slightly adjust the height of thearresting flange of the bracket. Once this adjustment is accuratelyobtained, the bracket may be locked in this position.

This in echanism for operating the design carrier-simultaneously withthe roller will now be described. f

Referring to Figs. l, 4 and 7, it will be seen that ythe shaft 8 extendstransversely of the niainhorizontal frame, being journaledinsuitablebrackcts 4l, 41, and that it is provided with spur gears 42,42', one adjacent each side of the main frame in alignment withlongitudinally slidable connecting rods 43, 43. The lower side of eachrod (see Fig. 7) is provided witha rack 44 meshing with thecorresponding spur gear, so that as the shaft8 is rotated, these spurgears 42, 42 will actuate the rods 43, 43 to slide them back and forththrough suitable guide brackets 45, 45 and 4G, 4G. At the other end ofeach of these rods there is connected the previously mentioneddifferential apparatus l2, 12, for translating a prede lterminedinvariable horizontal movement of these rods, corresponding to onecomplete rotation of the sensitized surface, into a variablepredetermined vertical movement of the design carrier, depending uponthe adjustment of saiddifl'lerential apparatus.

lVe. will next describe said differential apparatus and the manner inwhich it operates to move the carriage at a rate of travel that isconstant with respect to the peripheral vvelocity of the sensitizedroller during the projection of the design in'iage o nto the sensitizedsurface.

Referring to Figs. 1 to 6, inclusive, the

horizontal rod 4.3, as best shown in Figs. 2

and 4, is rigidly connected at its right-hand end to a horizontallymovable slide or carriage 47, the connection in the present instancebeing made by having the threaded extremity of the shaft pass through abracket 48 and locked with respect thereto, by means of adjustablelocking nuts 49. These nuts and the threaded portion of the shaft permitthe slide 47 to be adjusted on the end of the rod 43 so as to adjust theslide with respect to the vertical guides 3, to the position from whichit is to start its movements. This slide in the present instancecomprises a longitudinal bar 50 havingf atits ends downwardly projectingportions or lugs 5l. 51 in which are cut horizontal grooves 52 (see Fig.3) adapted to slidingly engage a. guide or track bar 53 rigidly securedto the main frame in any suitable manner as by brackets 54, so that asthe rod 43 isrmoved forward by the rotation of the power shaft, thecarriage 47 is caused to move from its predetermined starting pointalong the track 53 for a definite distance transverse to the verticalguides of the design frame.

An inclined guide bar or slide is provided with a swivel pin 56 near thelefthand end of the horizontal carriage, the pin being preferablythreaded into the guide bar and. extending from the surface thereofthrough a bearing boss 57 on the horizontal slide 47, and securedtherein in any suitable manner, the center of the pin being preferablyin alignment with the longitudinal center line of the slide bar 55. Asshown in F 4. the slide bar 55 is somewhat spaced laterally from thehorizontal bar of the sliding carriage 47, for the purpose of permittingthe movement of a slide block, hereinafter mentioned, alongthe inclinedslide The upper end of the inclined slide bar is likewise provided witha pin 58 the center of which also lies in thel center line of the bar.This pin projects laterally from the face of the bar and extends throughan arced slot 59 formed in an upright` eXtension GO of the horizontalcarriage 47. The pin is provided with either an enlargement or a sleeve61 extending from the face of the bar 55 to the inner face of the slot,and the pin is adapted to have a sliding fit within this slot so thatthe bar 55 may be swung about its pivot 56 through an are equal to thelength of this slot, for the purpose of adjusting the singularity of thebar with respect to the guide track 53, or in other words, with respectto the horizontal path of movement of the carriage 47. The outer end ofthe pin 58 is threaded, and provided with a locking nut 62 having asuitable handle 63, so that by turning the nut the bar 55 is rigidlyclamped in its .adjusted angular position, the slot member being at suchtime rigidly clamped between the outer face of the sleeve 61 and theinner face of the lock nut 62. When the bar 55 is thus adjusted in itsslot and clamped in position, it will be seen that the horizontallymovable carriage 47 with its rigidly clamped bar move togethertransversely of the uprights 3. In order to operatively connect thedesign carriage with the-slide bar 55, any suitable form of slide blockmay be provided operatively related to the bar 55 so as to engage and bemoved by the same, the block itself being suitably connected to thedesign carriage so that as the straight uniformly inclined bar 55 ismoved horizontally past the guides for the design carriage, the block,by its engagement with the bar 55 will cause this carriage to movedownwardly. For this purpose we provide a slide block 64 comprising inthis instance a triangular plate 65 carrying at its angles rollers 66,66, 6G, the spacing being such that the rollers just touch the oppositeedges of the bar with a snug rolling or sliding fit and without lostmotion. block should be swivelly connected with the design carriage soas to rock about its swivel axis to bring the opening` through therollers in proper alignment with the bar 55 for various adjustedpositions of the bar 55, and for this purposethe triangular plate isprovided with a pin 67 (Figs. 5 and 6) extending through bearings in aboss 68 formed on a vertical slide 69 which also operates on thevertical guides 3 on which the design carriage moves, this verticalslide 69 being suitably connected with the design carriage so that thetwo are moved together when actuated by the slide block. The pin hasnuts 67 securing it in place. F or the present purpose of consideringthe action of the slide block 64, it might be assumed that the slide 69is a part of the design carriaUe.

will be understood that the differential mechanism described withrespect to one side of the machine is duplicated on the other side ofthe machine so as to connect rod 43vto a vertical slide block 69 in thesame manner as has been described for the connection of rod 43 to thevertical slide 69.

It will be apparent from the foregoing description that with aninclination of the slide bar 55, as the horizontal carriage 47 carryingbar 55 is moved forward transverseto the vertical guides 3, the slideblock 64 will be caused to move downwardly, thus moving the designcarriage downwardly on its' vertical guides, and it will be obvious thatwith a given thron7 or travel of the horizontal carriage 47 the extentof the vertical movement of the block and design carriage will be.proportional to the angle formed between the bar 55 and its horizontalpath of movement; or between the bar 55 and the horizontal bar 50 towhich it is swiveled.

In the present mechanism illustrated, the extent of travel of the block64 along the vertical downward projection of the center of its swivelpin 67 corresponds to the tangent of theV right-angle triangle of whichthe bar 50 is the base and the bar 55 the hypothenuse. It will be seenthat with the mechanism described the rate of movement of the block 64and design carriage will be constant with respect to the rate of travelof the horizontal carriage 47 throughout the stroke or travel of thelatter, and hence the rate of movement of the design carriage will beconstant with respect to the peripheral velocity of the sensitizedroller throughout the complete rotation of the latter. This is a veryimportant feature in order that the design on the transparency Thisslide lll() may be accurately reproduced on the sensitized surface. Ifthe rate of movement of the design carriage should vary with respect tothe peripheral Velocity of the roller at any portion of the revolutionof the roller while the design is being projected thereon, the design asprojectedpon the roller during such period oft-imc will be distortedwith respect to the portion projected at another period of time. That isto say, if through a half revolution of the roller the ratio of the rateof movement o f the design to the peripheral velocity of the roller is lto 4, but during the last half of the revolution of the roller the ratiois .75 to 4, it will be apparent that during this last half of therevolution of the roller the portion of the design being transferredroller with respect to theother half, andv will be correspondinglyshortened on the roller in case the design carriage should be speeded u)with respect to the peripheral velocity of the roller during the lasthalf of the latters rotation. f y

If in designing the machine vwe deter mine on a deinite` throw or travelofthe horizontal carriage 47 for a complete revolution of the sensitizedroller, or for a complete revolution of the gear 16,.; say a travel often inches, and in assembling the ma chine so adjustably connect thecarriage 47 onto the end of the rod 46 that at its neutral or zeroposition shown in the drawing, the distance from the center of the pivotpin 56 of bar 55 to the downward vertical projection of the center ofthe pin 67 in the slide block 64, is equal to this throw of thecarriage, then for each revolution of the sensitized roller thehorizontal carriage 47 will be moved to an extent snllicient to bringpin 56 into alignment with the v rtical path of travel of pin 67. ltwill then be a very simple matter to provide a scale read`ng in lineardimensions, with respect to wh/iih the angularity of the bar 55 may beadjusted to move the block 64and the design carriage for any desiredtravel of the design carriage. This travel will normally lbe equal tothey height of the design on the carriage,

This may be illustrated graphically in they simplest form by Fig. 14,wherein the line' 55 represents the position of thel inclined bar 55,and the rizontal lin-e 50 represents the bar 50 t which the bar 55 isswiveled, as indicated by the point 56', while the. point 67 representsthe center of the pin 67, and the'dotted line 67 represents 'itsvertical downward projection or path of movement when the block is movedby the shifting of the horizontal carriage. Along this dotted line 67 weprovide a scale 67n graduated from the horizontal line 50 vpreferably inthe same linear units as it is desired to measure the height of thedesign in. It will be seen that in order to set the apparatus to movethe design through a delinite vertical distance equal, say, to theheight of the design, it is only necessary toY the block `64 and designcarriage will be moved through the said 8 inches and always at a uniformrate with respect to the peripheral velocity of the roller.

[n the'present apparatus it is not convenient to arrange lthescale atthis point, so that the scale has been transposed to the design carriageitself to be read with relation to the slide 69 to which the slide block64 is connected, as will shortly be described.

In the present form of the machine it has been designed specially for asix-inch diameter sensitized roller,K and the throw or travel of thehorizontal carriage 47 is made "about 18% inches in order to getmechanically desirable inclinations of the bar 55 within the limits vforwhich themachine is intended. v is carried to a point at whichwhenoc'cupied" by the pin 58, the vertical travel of thel`designvcarriage will be say 5 inches, which is estimated to be theminimum movement for Also, the bottom of the slot 59l designs to be usedin this particular machine, and hence the scale above referred to couldcommence at 5.

eferring now more particularly to Figs. 1,4 and "5, it will be notedthat the design carriage l is counterbalanced on its vertical guides 3,by counterweights 70, 70 connected to the carriage over wheels 7l, 71

mounted on cross bar 72 connecting the uprights 3.

In order to producefan accurate and fine adjustment? of the designcarrier 1 on thel vertical guides 3, 3, the following apparatus isprovided. A hand wheel 73y is provided for rotating-a'horizontal shaft74 journaled in brackets 74 mounted on the carrier, the

shaft carrying at its ends bevel gears 75,l -75 which operate uponcorresponding bevel gears 76, 7 6 keyed to vertical screws .77, 77

adjustment of the design carrier on its vertical guides 3 is for thepurpose of setting the horizont-al base line of the design, i. e., thelower end of the design at its zero position, which Imeans at a positionwhere it coincides with the center of light slot 8() (Fig. 5)hereinafter referred to. It might be here noted that the startingpointof the scale 81 on the design carrier may also coincide with thecenter of this slot 80. It will also be observed that when the handwheel 73 is not being operated to produce relative movement between thevertical slides 69, 69 and the design carrier l, that the connectinggearing serves to lock the carrier and the two vertical slides fromrelative movement so that the two will move in unison upon the verticalguides 3 when any external force is applied thereto.

It. will be noted from the foregoing .description that if the bar clampnut 63 is released so as to free the vertical slides 69, 69 so that theymay be moved on the vertical guides 3, if thenthe hand wheel 73 isrotated and the design carrier l either locked by some suitable clamp orkept in its position .due to the inertia of its mass, the rotation ofthe screws 77, 77 will cause f the vertical slides 69, 69 to movevertically on the guides 3with respect to the design frame and along thescale thereon.

Since the angle of the bar 55 is increased as the slide 69 is elevated,it follows thatI the extent of downward movement of the slide 69 anddesign carriage when locked together and driven by the differentialapparatus, will be proportional to the extent of vertical adjustment ofthe slide 69 from the bottom of the scale. If. therefore, some`indicating mark 82 is placed on the vertical /fjslide 69 cooperatingwith the scale so as to indicate upon the scale the vertical distance ofslide block pin 67 from the line of travel of pin 56 for any position ofslide 69, the scale and indicating means will provide a ready means ofdetermining the proper adjustment or setting of the vertical slide 69and the inclined bar 55 for any desired travel of the carriage. Theindicating means on slide 69 is here shown in the form of a Vernier forfine readings.

Immediately in front of the design carrier l is mounted suitableapparatus for providing the long narrow horizontal light slot 80. Thisapparatus (Fig. 8) consists of two horizontal flanged bars 83, 83 havingat each end end bosses 84, 84 slidable in grooves 85, 85 carried at theupper end of uprights 86, 86 mounted on a cross bar 87 of the mainframe. The bars 83, 83 are adjustable toward and froml each other bymeans of screws 88, 88 operated by bevel gearing 89, 89 from horizontalshaft. 90 operated by hand wheel 91. The edges of this slot, as shown inFig. 8, terminate in close proxim'ity toI the adjacent surface of thedesign plate, and the height of the slot is adjusted to give the desiredheight to the long narrow image-carrying beam of light to be projectedby the lens onto the sensitized surface. At the other end of the machinecorresponding apparatus is provided (see Figs. l, 9, l() and 11) forproviding a light slot at the focal plane of the lens tangent to thesensitized roller. This is shown in the form of two horizontal bars 92,92 mounted on brackets slid-able on two upright columns 93, 93 andadjusted thereon by means of screws 94, 94 so as to vary the height ofthe light slot according to the requirements of the work to beperformed. If a beam of light of too great a height be allowed to strikethe cylindrical surface of the sensitized roller, there will be acertain amount of distortion of the image as projected upon thecylindrical surface, and hence the necessity for the light openings.

lVhen the roller is being trued up with respect to the focal plane ofthe lens, the position-determining means 3l, 31 for this purpose,heretofore mentioned, are mounted slidably upon a horizontal bar 95which is temporarily secured to the uprights 93, 93 by curved ends ofthe bar which fit around reduced sections 96, 96 of the uprights 93, 93to which the bar is clamped by handoperated adjustment bolts 97, 97operating in threaded holes in the uprights. Further means of adjustmentof the bar with respect to the uprights is provided for by the smallscrews 98 (Fig. ll) ,threaded in the curved end of the bar and bea-ringupon the upright.

By this mechanism the bar 95 may be slightly adjusted back and forth ina horizontal 'l plane.

In order to examine the focus of the projected image. in the focal planeof the lens along the entire width of the sensitized roller, a smallslide 99 is provided adapted to lit upon the horizontal guide bar 95 invthe same manner as the slide 31 fits upon it, and this slide 99 'isadapted to have clamped thereto in any suitable manner, a small focusingground glass 100 adapted to lie in the intended focal plane of the lenstangent to the sensitized roller, and to be slid along the bar 95 so asto examine the design image throughout its desired width along the axiso f the roller before commencing the projection of the same onto theroller. When the proper focus has been obtained, this slidable groundglass is removed and then the roller position-determining means 3l maybe put in place on the bar 95 for adjustment of the llt) nn uil upon thebar 95 may be. removed and the bars 92, 92 adjusted for the desiredheight of the light slot prior to projection.

The lmethod of adjusting and operating the machine described may be asfollows: Say we are using in the machine a lens adapted and positionedto project an image of the design ontov the focal plane, 3 times thesize of the original design, 1. e., with the ratio of projection 3 to 1,and We desire to place this design on a roller the circumference ofwhich is 21 inches, and thatthe desired width of the design along theroller for printing purposes is to be 36 inches. ln

. such case we would provide a design plate 7 inches high and 12 incheswide. This plate will be properly centered longitudinally of the designcarrier 1 by any suitabledevice, and adjusted so that the base or lowerextremity of the design lies in horizontal -alignment with. the startingpoint of the scale 81, such for example, as in alignment with thedivision 5 shown in Fig. 5. lVith the bar clamping nut 62 now tightlyclamped to hold the bar and the vertical slide 69 from movement, thehand wheel 73 on the design carrier is rotated to bring the scaledivision 5, and hence the base of the design, in alignment with thecentral horizontal plane of the light slot 80, whereupon the clampingnut 62 is released; and then With the carriage 1 either locked inposition from vertical movement or held stationary by its` inertia, thehand Wheel 73 is again rotated to move the relatively light verticalslide 469 upward along the guides 3 until th-e mark on the Vernier comesopposite the division 7 on the scale, at Which position the slide bar 55will have the proper angle t'o' produce 7 inches of movement of thecarrier 1 and hence of the design plate. At this position the nut 62 isagain turned to lock the slide 69 and bar 55 firmly inposition fromfurther vertical movement. This being done, the slide G9 and carriage 1are now looked together from relative verticalmovement,

through the screws 77,71 ,and this end of the apparatus is now readytobe operated by the differential apparatus. The light slot 8O having beensuitably adjusted, the lenswisv next properly positioned on its short'longitudinal slideWay to give the desired ratio of projec-I The size ofthis projected image may bev measured in any desired well known manner,to see if it will be l of the desired proportions, i. e., 21 inches highby 36 inches long the axis of the roller. If this is found to be the,case, then the ground glass slide may be put in positlon on thehorizontal bar 95 and slid along the bar to examine the focus of theimage throughout the width of the image. If this is found to besatisfactory the roller position-determining means 31, 31, are nextslipped into position, and after the light is shielded or put out, thedesign roller through mechanism already described, is adjusted up to itsposition tangent to the focal plane, whereupon the apparatus is ready tohave the control lever 1() thrown to startthe simultaneous linearmovement of the design carrier and rotary movement of the roller, in themanner heretofore described; the rotation of the roller being arrestedat the-end of one complete revolution, also as heretofore described.

It will be understood that changes and modifications may be made iu theforni and arrangement lof the differential apparatus 4 for causing thedesign plate to be moved at a rate of speed constant'tothe peripheralvelocity of the roller. For example, in the particular differentialapparatushere shown the arrangement may be such that the functions oftheslide block .64 and the inclined bar may be just reversed. In this casethe slide block 64: could be connected to the horizontally movablecarriage 47 to more back and forth along the horizontal path nowtraveled by the pivot pin 56, and the inclined bar 55 could be securedto the vertically movable slide 69 and be provided with suitablevertical guides to cause it to move vertically with the said slide 69 sothat the travel of the guide block 64 operating on the bar 55 will movethe design carriage.

It is sometimes the case that-for use with the desired ratio ofprojection 'the design plate has not been made to dimensions that bearthe desired ratio to the circumferen-'c of the roller or to the lengthof the roller. Say for example, with a ratio of projection of 3 to l andwith the circumference of the sensitized roller 21 inches and thedesiredlength of the rollerv 36 inches, it is found that the design plate ornegative instead of lbeing 7 inches high land 12 inches wide, is v7inches high and 11 inches wide.

l The discrepancy in the Width of the image along the roller can, betaken care of by a slight adjustment of the lens so as to increase theratio of projection to enlarge the image along the length of the roller,but obviousl)1 if the'ratio of the velocity of the roller to the rate oftravel of the design carrier was made equal to this increased ratioofpro-- jection, as would be normally the case, it

would cause the image of the' design to over-` lap around the peripheryof the roller since the ratio of the height of the design to theperiphery of the roller was of thc correct predetermined 3 to 1 ratio;and hence to takje care of this trouble it is necessary that the ratioof the peripheral velocity of thev sensitized roller to the rate oftravel of the design carrier must not remain .equal to the new ratio ofprojection to be used in trans ferring the design, but must be madeequal to the original ratio of thel circumference of the roller to theheightA of the design nik lperipheral velocity of the roller had beenmade inversely proportional to the actual ratio of projection used. As aresult of this relatively fast rate of travel of the design plate theimage 4of the design Will loe somewhat foreshortened throughout its en-ltire length around the rollers from what it would otherwise have been.But since this is a uniform condition throughout the length of thedesign around the roller, and since the difference is distributedthroughout the periphery of the roller, it Will be uiinoticeable andnegligible. The situation7 of course, is equally Well talren care ofwhere the Width of the design bears the correct ratio to the length ofthe roller, but Where there is an error in the height of the design :inthe plate as compared to the circumference of the roller.

F ig. 13 merely illustrates a modification of the apparatus shown in theother figures, wherein the main element-s, i. e., the rotary support forthe sensitized roller, the lens and the frame for the design carriage,are each mounted on carriages capable of sliding in guideslongitudinally of the main frame, so as to adapt the apparatus for use'in connection with automatic focusing means which link up theseelements and cause them to slide one With respect to another along themain carriage to maintain automatic focus, as is Well understood in theart. or so as to enable them to be used with various lenses and manuallyfocused. lu this modification the vertical upriglits 3 for the design'carriage are mounted on a liorizontallv sliding carriage 3 and thehorizontally slid-able diiferential carriage 47 is iulapted to slideback and forth along the ai-litige, 8, and since the position ofcarrhige 3 along tho main bed of the machine will be .shifted from timeto time with respect to the position of the sensitized roller, it willbe necessary in this modification to provide some suitable couplingbetween the differential carriage 47 and its longitudinallyoperatingrod, to permit proper adiustinent of the carrier with respectto the longitudinal operating rod such as the rod 43 in Fig. 4. The lens13 in this form is simply mounted on a carriage with a longerlongitudinally throw or movement, and at the other end of the machinethe roller support 5 with its adjusting and rotating mechanism, are allmounted on a loiigitudinally sliding carriage 101.

lVhile We have described detail in connection With the present preourinvention in vferred embodiment of the same, it Will be obvious to thoseskilled in the art, after understanding the invention, that variousmodiiications in the arrangement, construction andcomloinations of partsmay be made Without departing from the spirit or scope of the invention,and We aim in the appended claims to cover all such changes andmodifications as are within the scope of the invention.

Having thus described our invention,`

lperipheral velocity of the sensitized surface and having a memberconnected With the roller to move a fixed distance for one rotationofthe roller and having co-operating means connected With the carrier tobe moved a variable extent ttorl one rotation of the roller dependingupon the adjustment of the ditferential apparatus, said co-operatingmeans including a sliding part slidably mounted upon a vertical guide tomove parallel With the design carriery and a screw shaft connecting saidsliding part with the design carrier to thereby adjust the sliding partwith respect to the carrier when the screw shaft is rotated, and to movethe carrier With the sliding part When the latter is actuated lby theaforesaid member connected with the roller, indicating means on saidslidable part and a co-operating scale operatively related to saidindicating means for indicating the. distance through which the carrieris to be moved by the sliding part, and for determining by the settingof said lindicating mea-ns with respect to said scale the setting' ofthe adjustable differential apparatus for producing proper movementv ofthe carrier.

2. In apparatus of the character desc"ibed, the combination of alinearly movable carrier for a design, a rotatable support for a rollerWith a sensitized surface, and means for moving the carrier and rotatingthe support so as to cause linear movement of the carrier in unison Withrotary movement of the sensitized roller, the carrieroperating meanscomprising tWo co-operating members, one a slide block and the other aslideivay, one of said members being moved linearly as distinguishedfrom rotatably and in unison With the rotation of the rotatable support,the other member being of the sensitized roller.

3..In apparatus of the character described, the combination of a linearlmovable carrier for a design, a rotatab e sup- -port fora roller with asensitized surface,

means for moving the carrier and rotating the support so as to causelinear movement of the carrier in unisonl with rotary movement of thesensitized roller, the carrieroperating means comprising twoco-operating members, one a slide block and the other an inclinedslideway, one of said members being moved linearly as distinguished fromrotatably and in unison with the rotation of the. rotatable support, theother member being connected with the design carrier to move the carrierin unison therewith, said members being so related that the movement ofthe actuating one of the members produces a rate of movement of theother which is constant relative to the peripheral velocity of thesensitized roller, means for adjusting the inclination of the slide withrespect to its path of movement to de termine the travel of the carrier,and means for projecting the design onto the sensitized surface.

4. In apparatus of the characterdescribed, the combination of alinearlyT movable carrier for a design, a rotatable support for a rollerwith a sensitized surface, means for moving the carrier and rotating thesupport .so as to cause linear movement of the carrier in unison withrotary movement of l the sensitized surface, ,the carrier-operatingmeans comprising a slide block and va cooperating linearly movable slideinclined to its path of movement relative to the block to actuate thelatter when moved, said slide being connected with the rotatable supportto be moved simultaneously therewith and at a rate of speed constantwith respect to the peripheral velocity of the sensitized roller, theslide block being connected with the design carrier to actuate thelatter at a rate of speed constant with respect to that of the block,and means for projecting the' design onto the sensitized surface.

5.A In apparatus of the character described, the combination of alinearly movable carrier for a design, a rotatable support for a rollerwith a. sensitized surface, means for moving the carrier and rotatingthe support so as to cause linear movement of the carrier in unison withrotary movement of the sensitized surface, the. carrier-operating meanscomprising a slide block and a cooperating linearly movable slideinclined to its path of movement relative to the block to actuate thelatter when moved, said slide being connected with the rotatable supportto be moved simultaneously therewith and at a rate of speed constantwith respect to the peripheral velocity of the sensitized roller, theslide block being connected with the design carrier to actuate thelatter at a rate of speed constant with respect to that of the block,means for adjustingv the inclination of the slide with respect to itspath 0f movement to determine the travel of the carrier, and means forprojecting the design onto the sensitized surface.

6. In apparatus of the character described, the combination of alinearly movable carrier for a design, a rotatable support for a rollerwith a sensitized surface, means for moving the carrier and rotating thesupport so as to cause linear movement of the carrier in unison withrotary movement of the sensitized surface, the carrier-operating meanscomprlsing a slide block and a co-operating linearly movable slideinclined to its path of movement relative to the block to actuate thelatter when moved, said slide being connected with the rotatable supportto be moved simultaneously therewith a predetermined distance for onerevolution of the rotatable support and at a rate of speed constant withrespect to the peripheral velocity of the sensitized roller, the slideblock being connected with the design carrier to move therewithtransversely of the slide when the latter is shifted, whereby thecarrier is caused to move a predetermined distance for one rotation ofthe sensitized roller and at a` rate of speed constant with respect tothe peripheral velocity of said roller, and means for projecting thedesign onto the sensitized surface.

7. In apparatus of the character described, the combination of avertically movable carrier for a design, a rotatable support for aroller with a sensitized surface, means for moving the carrier androtatable support so as to cause linear movement of the carrier inunison with rotary movement of the sensitized surface, thecarrier-operating means comprising a slide block connected to thecarrier to move vertically therewith, a carriage connected `with therotatable support -and adapted to be moved simultaneously verticallywhen the horizontally movable carriage is shifted.

8. In apparatus of the character described, the combination of alinearly movable carrier for a design, a rotatable support for a rollerwith a sensitized surface, means for moving the carrier and rotating thesupport so as to cause linear movement of the carrier in unison with therotary movement of' the sensitized roller, means for projecting thedesign onto the sensitized surface of the roller, including a lensbetweenthe design and the roller, two adjacent relatively adjustablemembers in front of the design providing between them a long narrowlight-transmitting slot extending along the design transparency closelyadjacent thereto, means at each end of said members for supporting andadjusting same to regulate the height of the slot, means in front of andadjacent the surface of the sensitized roller for providing a longnarrow light slot closely adjacent the surface of the roller andextending substantially parallel therewith, said last means alsocomprising two relatively adjustable members with means for adjustingthe same to vary the height of said light slot.

9. In apparatus of the character described, the combination of alinearly movable carrier for a design, a rotatable sup-H port foraroller with a sensitized surface, means for moving the carrier androtating the support so as to cause linear movement of the carrier inunison with rotary movement of the sensitizedroller, means forprojecting the design onto the sensitized surface, and adjustment meansfor positively and simultaneously arresting the travel of the carrierand the rotation of the roller at the end of one complete rotation ofthe roller, said stop means comprising a rotatable member geared withthe rotatable support and carrier, and a co-operating stop for arrestingthe rotation of said rotatable member at the end of lessthan onecomplete revolution of said member, 1

l0. In apparatus of the character described, the combination of avertically movable carrier for a design, a rotatable support for aroller with a sensitized surface, means for moving the carrier androtating the support so as to cause -vertical movement of the carrierin'unison with rotary movement of the sensitized roller, saidy meanscomprising an adjustable differential apparatus for regulating the rateof movement of the carrier with respect to the peripheral velocity ofthe sensitized surface and having a member connected with the roller tomove a xed distance for one rotation of the roller and having aco-operating member connected with the carrier and movable a variableextent for one rotation of the roller depending upon the adjustment ofthe differential apparatus, the carriermoving means also comprising aslide a'djacent the design carriage and slidably mounted upon a verticalguide to move parallel with the design carrier and connected to thevariable movement member of the differential apparatus to be movedthereby and gearing connecting said slide with the design carrier tomove one with respect to the other and capable, when vnot beingoperated, to lock said carrier and'sliding member together from relativemovement, indicating means on said slidable member and a scale on thecarrier operatively related to said indicating means for indicating thedistance through which the carrier is'to be moved and determining by thesetting of said indicating means with res ect thereto the setting of theadjustable difirential apparatus for producing the proper movement ofthe carrier.

l1. In. apparatus of the character described, the combination of alinearly movable carrier for a design, a rotatable support for a rollerwith a sensitized surface, means for moving the carrier and rotating thesupport so as to cause linear movement of the carrier in unison withrotary move-` ment of the sensitized roller, means for projecting t-hedesign onto the sensitized surface of the roller, position-determiningmeans in front of the roller comprising a part at each end of the rollerto co-operate with each end of the roller, said means lyingsubstantially in the focal plane of the lens where it is desired toposition the periphery of theroller, and means for adjusting each end ofthe rotary support of the rollerl toward and from said means so as totrue up the roller with respect to said focal plane.

l2. In apparatus of the character described, the combination of alinearly movable carrier for a design, a rotatable support for a rollerwith a sensitized surface, means for moving the carrier and rotating thesupport so as to cause linear movement -of the carrier in unison withrotary movement of the sensitized roller, means for projecting thedesign onto the sensitized surface of the roller, a focusing groundglass and means for slidably mounting same so that it will liesubstantially in the focal plane and travel along a line defined by thel intersection of said focal plane with the horizontal axial plane ofthe roller, whereby by sliding the ground glass along said line thefocus of they design throughout its entire width may be examined in thefocal plane at the position where the image of the design is to beprogressively projected onto the roller.

In testimony whereof we have signed our names to this specification.

JOHN DARBY. HARRY C. JONES.

